686428597960 has 128 divisors (see below), whose sum is σ = 1788343764480. Its totient is φ = 232263733248.

The previous prime is 686428597931. The next prime is 686428597961. The reversal of 686428597960 is 69795824686.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 686428597960.

It is not an unprimeable number, because it can be changed into a prime (686428597961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8409504 + ... + 8490736.

It is an arithmetic number, because the mean of its divisors is an integer number (13971435660).

Almost surely, 2^686428597960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686428597960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894171882240).

686428597960 is an abundant number, since it is smaller than the sum of its proper divisors (1101915166520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686428597960 is a wasteful number, since it uses less digits than its factorization.

686428597960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81647 (or 81643 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 686428597960 in words is "six hundred eighty-six billion, four hundred twenty-eight million, five hundred ninety-seven thousand, nine hundred sixty".